# Time dependent MHD models for aluminium reduction cells

Bojarevics, V. and Pericleous, K. (2010) *Time dependent MHD models for aluminium reduction cells.* In: Jim Evans Honorary Symposium: Proceedings of the Symposium Sponsored by the Light Metals Division of The Minerals, Metals and Materials Society (TMS). John Wiley and Sons, Hoboken, USA, pp. 199-206. ISBN 9780873397506

## Abstract

Time dependent MHD or stability problems for the aluminium reduction cells are typically restricted to the mathematical developments without the inclusion of the electrolyte channels. However, according to the well known Moreau-Evans model, the presence of electrolyte channels

increases very significantly the stationary interface deformation. In this paper general time dependent theory and numerical modelling of an aluminium cell is extended to the case of variable bottom of aluminium pad and variable thickness of electrolyte to account for the channels.

Instructive analysis is presented for multi-physical coupling of the magnetic field, electric current,

velocity and wave development by animated examples for the high amperage cells. The results indicate that the ‘rotating wave’ instability is dominant in simplified cases not accounting for the effect of channels. The effect of channels creates a stabilizing effect, resulting in a ‘sloshing’,parametrically excited MHD wave development in aluminium reduction cells.

Item Type: | Conference Proceedings |
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Title of Proceedings: | Jim Evans Honorary Symposium: Proceedings of the Symposium Sponsored by the Light Metals Division of The Minerals, Metals and Materials Society (TMS) |

Additional Information: | This paper forms part of the published proceedings from Jim Evans Honorary Symposium - TMS 2010 Annual Meeting and Exhibition held in Seattle, 14-18 February 2010 |

Uncontrolled Keywords: | electrometallurgy, aluminium reduction cells, waves, magnetohydrodynamics |

Subjects: | T Technology > TN Mining engineering. Metallurgy |

School / Department / Research Groups: | School of Computing & Mathematical Sciences School of Computing & Mathematical Sciences > Department of Mathematical Sciences |

Related URLs: | |

Last Modified: | 02 Mar 2012 09:33 |

URI: | http://gala.gre.ac.uk/id/eprint/7704 |

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